Looking at some 2021 fall fashion trends that weren't outrageous, I found a few that were worth mentioning as modest in design and style. The lengths on skirts are short or long and with patterns one can adjust to a modest length fairly easily.
Dresses
This dress found here. This is a simple design but made to look great by the fabric choice.
A simple shirtwaist dress pattern such as N6551 could be adapted by leaving the collar off and finishing with a bias band or a facing and making the sleeves long. Use another pattern for the sleeve to make a little pleat on top or leave plain and to get the length you like. It also has 2 square pockets on the bodice which are up to you to make or leave off. Make the skirt as long as you like. The waist looks like a self fabric belt with ornamentation. It also looks like a heavier fabric--maybe a denim weight?
Dress from this site.
There are simple dress patterns that can be adapted any body style. Just figure what you are comfortable with and that enhances your modest presentation of who you are and who you represent. Knits are more difficult to sew with and may follow lumps and bumps you would rather not show. 
Blouses
Skirts
The above skirt is priced at $1190.00 It has interesting lowered side gatherings. To make a similar model using a commercial pattern, try Simplicity 9180. You could sew the pockets to the skirt if you want a similar look.
Here are a few more skirt patterns for a different look.
There is a cute make of this skirt on this site where there is appliqued design on the pockets and it looks very professional and stunning!
